Take a look at the attached picture ..
If you need 1mV per 0.1° output change 49.99kΩ resistor to ≈250kΩ - this will set the gain to 26 - and the output of this amplifier will produce 1mV for every 0.1° ..
hello ianP
tks for ckt,
but i have a doubt about internal offset of op-amp,
will this ckt have this compensation?
any way i will try this on bread board.
Hi
I was facing the same problem few months ago.
I got a circuit which will give 20 mv for 0.1 C change. It was consisting of IA, OPmp and Active LPF.
I can't email it to u. but I could help u in imlemting your own
Added after 6 minutes:
IA : instrumentation amplifier
Opamp was used to adjust offset and final gain adjust.
Active LPF : was to eleminate supply noise due to Full/half wave rectifier.
Also there were current sourse that was used to fed the sensor with refrence current